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/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *  
 *    http://www.apache.org/licenses/LICENSE-2.0
 *  
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License. 
 *  
 */
package org.littleshoot.mina.common;

/**
 * An {@link IoFuture} for asynchronous write requests.
 *
 * Example
 *  * IoSession session = ...;
 * WriteFuture future = session.write(...);
 * // Wait until the message is completely written out to the O/S buffer.
 * future.join();
 * if( future.isWritten() )
 * {
 *     // The message has been written successfully.
 * }
 * else
 * {
 *     // The messsage couldn't be written out completely for some reason.
 *     // (e.g. Connection is closed)
 * }
 * 
 * 
 * @author The Apache Directory Project ([email protected])
 * @version $Rev: 555855 $, $Date: 2007-07-13 12:19:00 +0900 (Fri, 13 Jul 2007) $
 */
public interface WriteFuture extends IoFuture {
    /**
     * Returns true if the write operation is finished successfully.
     */
    boolean isWritten();

    /**
     * Sets whether the message is written or not, and notifies all threads
     * waiting for this future.  This method is invoked by MINA internally.
     * Please do not call this method directly.
     */
    void setWritten(boolean written);
}